Finding the Fourth Proportional to 197.19, 272.15 and 135
Calculator
Solution
The fourth proportional to 197.19, 272.15 and 135 is: 186.32
Step by Step Solution
- Step 1: Write the proportion equation
197.19 : 272.15 = 135 : x - Step 2: Convert to fraction form
197.19/272.15 = 135/x - Step 3: Cross multiply
197.19x = 272.15 × 135 - Step 4: Simplify right side
197.19x = 36,739.58 - Step 5: Solve for x
x = 36,739.58/197.19 - Step 6: Final answer
x = 186.32
Related Problems
Find fourth proportional to 98.60, 136.07 and 67.50
Half scale
Find fourth proportional to 394.38, 544.29 and 270
Double scale
Find fourth proportional to 198.19, 273.53 and 136
Similar ratio
Find fourth proportional to 295.79, 408.22 and 202.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.